| 摘要 |
PURPOSE:To provide the titled additive having excellent transparency, heat resistance, modulus of elasticity, strength, etc. and serving to maintain the ultraviolet absorbing capacity of an ultraviolet absorber, which comprises a specific scaly inorganic compound and an ultraviolet absorber chemically bonded thereto in an integral form through a coupling agent etc. CONSTITUTION:A scaly inorganic compound which is a mineral belonging to the smectites group, such as montmorillonite, having an average molecular weight of 20mu or less, an average thickness of 0.3mu or less and an average aspect ratio of 10 or higher is reacted with a benzotrizole, benzophenone or cyanoacrylate cationic ultraviolet absorber of the formulae I-III (wherein X is H or Cl; and Y, Z, W and Q are each an alkyl) in the presence of a third component such as silicon, titanium or aluminium coupling agent having a chloro group, alkoxy group, acetoxy group, etc., capable of linking with an inorganic compound upon being hydrolyzed as well as having a group capable of reacting with a reactive functional group present in the ultraviolet absorber, thereby causing the inorganic compound to be chemically bonded to the ultraviolet absorber in an integral form by means of an ionic bond etc., through the coupling agent.
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